package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.ExceptionHandler;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    //    新增分类
    @Override
    public void saveCategory(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

        category.setStatus(StatusConstant.DISABLE);
        categoryMapper.saveCategory(category);
    }

//    分类分页查询
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> category=categoryMapper.pageQuery(categoryPageQueryDTO);
        Long total=category.getTotal();
        List<Category> result = category.getResult();
        return new PageResult(total,result);
    }

//    根据id删除分类
    @Override
    public void delete(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count=dishMapper.countByCategoryId(id);
        if (count>0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }
        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        Integer count1=setmealMapper.countByCategoryId(id);
        if (count1>0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.delete(id);
    }

//    修改分类
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);

        categoryMapper.update(category);
    }

//    启用、禁用分类
    @Override
    public void startOrStop(Integer status, Long id) {
        Category category=Category.builder().status(status).id(id).build();
        categoryMapper.update(category);
    }

//    根据类型查询分类
    @Override
    public List<Category> list(Integer type) {
        List<Category> list=categoryMapper.list(type);
        return list;
    }
}
